ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Atherosclerosis in neck arteries. The scan shows the carotid blood vessels in posterior (rear) view. The irregular appearance of the arterial walls, and areas of narrowing, indicate the presence of atheromatous plaques, deposits of cholesterol and fats on the blood vessel walls. This narrowing (stenosis) is a risk factor for strokes. For a version of this scan showing the narrowed areas with arrows, see image C038/8554.
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